Improvement in spring-bolsters for vehicles



UNITED STATES PATENT EEICE.

HENRY BUCK, OF POLO, ILLINOIS.

iMPRovEMENT IN SPRING-BoLsTERs Fon VEHICLES.

Specification forming part of Letters Patent No. 158,621, dated January12, 1875 application iiled November 14, 1874.

To atl w/Lom tt may concern: p

Be it known that I, HENRY BUCK, of Polo, in the county of Ogle and Stateof Illinois, have invented a new and valuable Improvement inSpring-Bolsters; and I do hereby declare that the following is a full,clear, and exact description of the construction and operation of thesame, reference being had to the annexed drawings making a part of thisspecification, and to the letters and figures of reference markedthereon. Figure l of the drawing is a representation of a frontelevation of my spring-bolster. Fig. 2 is a front elevation of the same,with section showing spring. Fig. 3 is a transverse sectional view ofthe same. v

This invention has relation to spring-bolsters for vehicles, wherein thesaid springs are attached to a detachable bar, and bear against theholster; and the nature of the invention conslsts 1n curved springsrigidly secured within a deep recess of the said detachable bar, wherebythe wagon-body is raised but little above the bolster at the same timethat an efficient spring-action is obtained. It'also consists in curvedsprings, rigidly secured within such a recess, the inner arms of whichare shorter than their outer arms, whereby "the weight of a light loadwill be first received by the outer arms of the said springs, and, whenincreased, by the inner arms thereof, thereby increasing or `diminishing their strength or power 'of resistance to downward pressure inaccordance to the weight of the load, and obtaining under allcircumstances an easy, comfortable, springing action therefor, as willbe herein after more fully explained.

In the annexed drawings, A designates the axle of an ordinaryfarm-wagon, in connection with which I propose to show the applicationand general construction of my improved bol-y ster-spring, and B is abolster applied thereon in the usual well-known manner. This bolster isprovided at each end with an upright stake or standard, b, the innersides or faces a of which are vertical to the horizontal plane of thebolster, as shown in Fig. 1. C designates a detachable bar, which isapplied upon the bolster B between the standards b, and is guided tomove up and down in a horizontal v plane by means of notches c cut intocach of its ends, within which the standards b are received. The lowersurface of this detachable bar has two curved recesses, d, at each sideof the center of its length, which are adapted to receive within them acurved metallicv spring, S, which is rigidly held in place by means of asuitable bolt. The recesses d are continuous, and are designed toreceive within them the whole of the springs S, so that when na wagon isvery heavily loaded the bar C may be forced into close contact with thebolster, thereby lowering the wagon-body and lessening the chances ofupsetting on an uneven road.

By an examination of Fig. l it will be readily seen that the inner armss of the springs are shorter than the outer arms s thereof, and thatconsequently when the bar O is put in position the ends only of theouter arms s will bear against the bolster 5 hence, when a light load isin the wagon-body the spring-ac tion will iirst be obtained from thearms s', that of the inner arms being in reserve, and only brought intoplay when the resistance of the outer arms has been sufficientlyovercome to bring the ends of the inner arms down upon the bolster. Inthis manner I have avoided the extremes of making the springs too rigidfor a light load, and too flexible fora heavy one, bringing are-enforcng-spring to bear when the resistance or action of the longerarm s has been overcome, thereby securing at all times and under anycircumstances a perfectly easy and effective spring-action.

With a view to preventing undue wear of the upper surface of thebolsters by the ends ofthe springs S, I have interposed metallic platesp between them, as shown in Fig. l, the said plates being rigidlysecured in any suitable manner to the bolster at that point againstwhich the springsl bear.

I am aware that a spring-bar carrying a concave curved plate and openguide has heretofore been employed in connection with a compoundelliptic spring, formed of leaves, and a bolster provided with endguides and supports, and I therefore lay no claim togsuch invention.

What I claim as new, and desire to secure by Letters Patent, is

1. The combination, with the detachable bar C and the bolster, B of thecurved metallic springs S, substantially as specified. A

2. The combination, with the bolster B, of the detachable bar C, havingsprings S, with short re-enforcing arms s and primary arms s', rigidlysecured into the recesses d of the said bar, substantially as and forthe purpose set forth.

3. The combination of the ber C, having re-v oessed springs S ofthebolster B, having plates p, substantially as specified.

4c. The combination with the bar C, having notches c and curved springsS, of the guiding-standards b of bolster B, substantially as specified.

In testimony that I claim the above I have hereunto subscribed my namein the presence of two Witnesses. Y

' HENRY BUCK. Witnesses:

ISAAC GRIM, HENRY APLINGTON.

